Warp stop-motion for looms.



PATENTED AUG. 11, 1903.

J. B. LBMYRE. WARP STOP MOTION FOR LOOMS.

APPLIOATION FILED AUG. 18, 1902.

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PATENTED AUG. 11, 1903.

J. B. LEMYRE.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED AUG. 18, 1902.

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PATENTED AUG. 11, 1903.

J.- E. LEMYRE.

WARP STOP MOTION FOR 'LOOMS.

APPLICATION IILED AUG. 18. 1902.

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APPLICATION FILED AUG. 18, 1902.

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PATENTED AUG. 11, 1903.

J. B. LEMYRE. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED AUG. 18, 1902.

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PatentedAugust 11, 1903.

PATENT OFFICE.

JOSEPH E. LEMYRE, OF MANCHESTER, NEW HAMPSHIRE, ASSIGNOR TO TEXTILEMACHINERY IMPROVEM NEW JERSEY.

ENT COMPANY, A CORPORATION OF WARP STOP-MOTION FO'R LOOMS.

SPECIFICATION forming part of Letters Patent No. 735,785, dated August11, 1903. Application filed August 18, 1902. Serial No. 120,013. (Nomodel.)

To all whom/it may concern:

Be it known that I, J OSEPH E. LEMYRE, a citizen of the United States,and a resident of Manchester, in the county of Hillsborough and State ofNew Hampshire, have invented new and useful Improvements in Warp Stop-Motions for Looms, of which the following is a specification. 7

My invention relates to warp stoprmotions for looms; and it consists ofcertain novelties and improvements in and upon warp stopmotions of theclass characterized by a system of warp-thread detectors, a feelerregularly oscillated with relation to the detectors, and ashipper-actuator controlled by the feeler, all these component partsbeing soarranged that when the warps are in proper condition to actalike onall' the detectors the feeler is unobstructed in its normalmovements, but that when a warp is displaced unduly from its properposition it fails to act,

as usual, upon the detector appropriate to it, so that the saiddetector, moving from its usual position in the system, obstructs thenormal movement of the feeler, which then by means of suitableconnections controls the shipper-actuator to stop the loom. 111stopmotions of this character the feeler may operate on theshipper-actuator through electrical or mechanical intervening devices. Astop-motion of the character above generally described is shown inUnited States Letters Patent No. 692,316, granted to me February 4,1902, and I here" illustrate my present invention as applied to a warpstop-motion such as shown in the said patent.

In the drawings hereto annexed,which show an embodiment of my inventionand improvements, Figure 1 is a general view, in vertical cross-section,of a loom having my improved warp stopmotion attached. Fig. 2 is a topplan view of the front part of the loom shown in Fig. 1, on a largerscale. Fig. 3 is a vertical cross seenon, on a still larger scale,showing the position of the parts of the stop-motion when a warp-threadis broken or displaced and they lay is at its rearward position. Fig. 4is a similar vertical cross-section'show ing the action of thestop-motion on the shipper as the lay beats forward. Fig. 5 is a similarvertical cross-section showing the parts as they stand while the lay ismoving rearward or as they stand after the stop-motion has operated tostop the loom. Figs. 6 and 7 are views in elevation and cross-section,respectively, of a detail of construction. Fig. 8 is a detail showingone of the detectors, and Figs.

motion described in my saidpatent is not perfectly adapted to'meet therequirements of the manufacturer, for the reason that the stop motion isunder such conditions liable to stop the loom oftener than is actuallynecessary. For instance, in weaving the finer grades of goods, such ascotton-print cloth, the tension of the warp is often very moderate andsome of the warp-threads are almost certain to become slack as comparedwith the general body of 'the warp and yet be not so slack as to createany substantial defect in the goods. Under these conditions a detectorsuch as described in my said patent will fall far enough below its usualposition as to stop the loom, even when no warp-thread is broken or hasbecome so slack as to require attention, and thus the loom may bestopped very much oftener than is necessary, entailing loss of time insearching for a defect which does not exist and decreasing theproductive effi ciency of the loom by reasonof such delay, n

The improvements herein described constitute a stop-motion which whilein every respect as sensitive to defects of the warp as the stop-motionof my said patent is nevertheless insensitive to variations in the warpwhich do not constitute defects.

Referring to Fig. 3 of the drawings, the detectors d are seen in theposition when they are supported by the warp-threads on the f oringshaft F.

mation of the shed by the hcddles C. These detectors (1 are pivoted at(l upon a shelf r1 the said shelf being secured at its ends to theblocks D. The blocks D are pivoted at D to the vertically-adjustablestuds U, which are clamped at the end of the reed, and an arm D issecured to one of the blocks D, extends forwardly therefrom, and isprovided on its lower side with a cam-block D The spring D secured atthe outer end of the barD and also to the pivot-bearing D tendsconstantly to depress the arm D and consequently to elevate the shelf(.1 which carries the supports or detectors d.

The feeler F is suspended by short rods f from the rocking shaft F,which rocks 011 bearings secured to the laycap L. The top of the rockingshaft F is planed off or flattened and the arm F is secured by screws orotherwise to the flattened surface of the rock- Upon the lower side ofthe arm F thereis secured the cam-block F Pivoted at the outer end ofthe arm F at F is the connecting-link F which is pivoted also at F tothe finger m, which constitutes the connection between the feeler F andthe shipperactuating devices which form part of the stopmotion.

Pivoted on the bearing D are two leverbars D and G, Figs. 2 and 3. Thelower ends D and G of these lever-bars play between the abutment piecesa a, which are adjustably secured to the stationary plate A, fast to theunder side of the breast-beams of the loom, so that as the lay swingsback the bars D and G strike their lower ends D and G against theabutment a and as the lay swings forward strike against the abutment a.The upper ends of these bars cooperate with the cam-blocks D and F,respectively, and when the lay swings back the lower ends of the bars,as aforesaid, strike the abutment a and raise the arms D and Frespectively, against the pull of the springs D and F. The result ofthismovement is the simultaneous lowering of the detector-shelf (Z andthe withdrawal of the feeler F from beneath the hooks d of the detectors(1. This movement of the shelf (1 and the feeler F takes place as thelay reaches its extreme backward position, and thus at a time when thewarps are raised to form the shed. If the warps w are all intact and atproper tension, the detectors find their support upon the warps byresting the warpnotches d upon the warp-threads, and the hooks (Z arethus retained ina position of sufiicient elevation to permit the feelerF to return without obstruction under the hooks (1' when the lay beginsits forward movement and by moving the end G of the bar G from theabutment (t permits the spring F to act upon the bar F If, however, awarpthread is broken or unduly slack, the detector, which extendsimmediately from it, drops down, turning in the bearing d upon itsrounded end (i Fig. 8, and falls to such a position that the feelerF isprevented from returning to its normal place under the hooks (l Thus thebar F link F, and finger m are retained in an elevated position, and asthe lay swings forward the linger on strikes the lug n upon theshipper-bar 'n, which knocks the shipperhandle II out of its notch andstops the loom in the usual manner. In order that a harmlessly-slackwarp-thread will not cause the stop-motion to operate, I provide awarp-leveler S, which in the specific form of mechanism shown in Figs. 1to 5, inclusive, constitutes a lip or flange projecting downward fromthe detector-shelf (Z to such an extent that when, as above described,the said shelf swings downward to lower the detectors into operativeposition it presses upon the warpthreads and levels the tighter warpsinto even position with the slacker warps, and thus insures an equalsupport for all the detectors, provided a warp is not broken, as at w,Fig. 3, or is not so slack as to constitute a' defect.

In order that the detectors may be depressed into warp contact positiononly at the critical moment when the lay reaches the backward limit ofits swing and so that the warps may not be subjected to any rubbing ofthe detectors themselves, 1 provide an abutment a, which arrests thelower end I) of the bar D at the forward swing of the lay and moves theupper end of the said bar out from under the cam-block D and permits thebar D to move downward under the influence of the spring D. Thismovement raises the shelf and detectors (1, restoring them to theirnormal position and permitting the feeler F to resume its place underthe hooks d In order to guard against the finger m striking too high atthe forward swing of the lay, I provide the steering-arm m and the guidem the latter being secured to the front beam of the 100m. These twoparts are so proportioned that the steering-arm m is depressed justenough to steer the finger m straight against the lug n of theshipper-arm n. The operation of this stop-motion is indicated by thesuccessive Figs. 3 to 5, inclusive. In Fig. 3 the lay is shown at itsextreme backward movement when the broken warp w has permitted one ofthe detectors to fall below the others to a position where it arreststhe feeler F. Fig. 4 shows the lay at its forward swing just as thefinger m reaches the lug n and the instant before the last forwardmovement of the lay causes the lower end D of the bar D to strike theabutment a, so as to permit the bar D to fall and the shelf (1 to rise,and Fig. 5 shows the stop-motion at the instant when the lay has swungpartially back (the loom having stopped) and the detector-shelf d haslifted all the detectors into contact with the stop-plate 0, so that thefeeler F slips into its normal position. This is also the position ofthe parts when the lay is swung forward and the warps are all in goodcondition, the finger m being so far depressed as not to affect theshipper-lever n.

In Figs. 9 and 10 I have shown a modification of my invention whereinthe Warp-leveler S is illustrated as a fixed bar extendingacross thefront of the reed R below the de tector-shelf (1 In Fig. 9 aslightly-slack warp 10 is shown, and in Fig. 10 the warp 10 is shown asdepressed along with all the tight warps, so that the entire shed isevenly leveled to receive the detector. However, the particular form inwhich the means for leveling the warps is embodied is wholly immaterial,the only physical requisite being that said means shall act to levelboth the tight and loose warps as the detectors and warps come intooperative relation.

Figs. 6 and 7 show the guard-bar O and its fastening-clips 0, whereby itis secured to the lay-cap L, and also show the mode I have adopted forsteadying the rockerbar F, which, especiallyin very wide looms, isliable to spring if unsupported. Collars P are shrunk or wedged upon thebar F at intervals along its length, and hooks P are screwed into thelay-cap L until they just bear against the collars P.

What I claim, and desire to secure by Letters Patent, is-

1. In a warp stop-motion for looms of the character described, thecombination of a system of warp-detectors, a movable support therefornormallyholding the detectors out of warp contact position, and meansfor vibrating the detector-support and detectors to and from the warp atregular intervals.

2. In a warp stop-motion for looms of the character described, thecombination of a system of warp-detectors, and means for leveling thewarps as the detectors and warps come into operative relation.

3. In a warp stop-motion for looms of the character described, thecombination of a system of Warp-detectors, a movable support therefornormally holding the detectors out of warp contact position, means forvibrating the detector-support and detectors to and from the Warp atregular intervals, a warpleveler, and means for pressing the leveler ivU upon the warps as the detector-support moves the detectors to warpcontact position.

4. In a warp stop-motion for looms of the character described, thecombination of a system of warp-detectors, a movable support therefornormally holding the detectors out of warp contact position, anabutment, and means, operated by the abutment, to move thedetector-support and detectors into warp contact position as the shed israised.

5. In a warp stop-motion of the character described, the combination ofa system of warp-detectors, a movable support therefor,

normally holding the detectors out of warp contact position, a rearabutment and a forward abutment, and means, operated by the rear andforward abutments, to lower and raise, respectively,thedetector-support,as the lay swings to rear and front, respectively.

6. In a warp stop-motion of the character described, the combination ofwarp-detectors, a shelf therefor, pivoted upon the lay, an arm securedto the pivoted shelf, a cam, a leverbar, and operating abutmenttherefor, substantially as described.

7. In a warp stop-motion of the character described, the combination ofdetectors, a feeler, a shipper-actuating finger, and a guide forpositively steering the shipper-finger.

8. The combination in a warp stop-motion of the character described, ofdetectors, a feeler, a detector-shelf, pivoted on the lay, an armtherefor, a controlling-spring, a cam, and lever-bar; an arm secured tothe feeler, a controlling-spring therefor, cam, and lever-bar, abutmentson the loom, cooperating with the said lever-bars, and shipper-actuatingdevices controlled by the feeler-bar, substantially as 4 described.

Signed by me,at Manchester, aforesaid,this 29th day of July, 1902.

JOSEPH E. LEIWIYRE.

I'Vitnesses:

FRANK G. TwoMBLY, FRANK S. HARTNETT.

